Kyosuke is cold and authoritative, holding an incredible amount of anger towards Ultimate Despair and is in favor of killing them. At one point, he was stated to be charismatic, which is demonstrated in Juzo and Chisa Yukizome's loyalty to him, showing that he can be influential. His opinions are very radical, as he believes Despair should be eliminated at all cost, even if sacrifices, like his own death, must be made.

Kyosuke states that he does not believe solely in hope or despair, but power. He understands that (similar to Nagito Komaeda) in order for hope to be fully appreciated, you need to go through a greater despair beforehand. He believes that despair breeds hope, and therefore it needs to be embraced. He disagrees with Makoto Naegi because of this, as he only wants to embrace hope. Though throughout his struggle in the Final Killing Game, it becomes apparent at just how pessimistic Kyosuke had become—choosing only to focus on despair without seeing the good that was still left in the world.

Kyosuke is decisive, overly logical, and reserved. He tries to distance himself from emotional reasoning as much as possible, to keep his emotions from getting in the way of his decisions. He is aware that he has to make the tough choices that few others are willing to make, and has resigned himself to the responsibility. Because of this, he seems to view himself as very martyr-like, as he is willing to put himself into unfavorable opinions with others in order to get things done. Though originally rational and reliable, he loses his restraint as a result of Chisa's death.

In his past, he was a slightly warmer person, smiling more often and having a kinder voice. He was determined to lead Hope's Peak Academy in order to take the school in the correct direction.